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Filter Offsets: Astronomik Deep Sky vs Type 2
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19-01-2019, 02:29 PM
Merlin66
(Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,907
Peter,
I can't seem to find any Chromatic data for the TEC 180
You mention "Worst case by design for my TEC180FL should be 60 microns"
can you clarify?
Using a spectrograph on any/ all your filters will quickly confirm any leakage.
Merlin66
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